Display screen or portion thereof with a tab based graphical user interface



FIG. 1 is a front view of a display screen or portion thereof with a tab based graphical user interface illustrating a first image of the novel design.

FIG. 2 is a front view of a display screen or portion thereof with a tab based graphical user interface illustrating a second image of the novel design.

FIG. 3 is a front view of a display screen or portion thereof with a tab based graphical user interface illustrating a third image of the novel design.

FIG. 4 is another view of FIG. 1 but shown without the broken lines or stippling illustrating portions of the graphical environment, for clarity of illustrating the claimed design.

FIG. 5 is another view of FIG. 2 but shown without the broken lines or stippling illustrating portions of the graphical environment, for clarity of illustrating the claimed design; and,

FIG. 6 is another view of FIG. 3 but shown without the broken lines or stippling illustrating portions of the graphical environment, for clarity of illustrating the claimed design.

The broken lines, including the display screen as well as portions of the graphical user interface are included for the purpose of illustrating the graphical environment and form no part of the claimed design. The stippling forms no part of the claimed design.

The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1-3. The process or period in which one image transitions to another image forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a tab based graphical user interface, as shown and described. 